FoE Great Buildings Calculator

A. What is a FoE Great Buildings Calculator?

A FoE Great Buildings Calculator is an essential online tool for players of Forge of Empires (FoE) to strategically plan the leveling of their Great Buildings (GBs). Great Buildings are monumental structures in the game that provide significant bonuses, resources, and boosts to a player's city. Leveling them up requires a currency called Forge Points (FPs), which can be quite costly. This calculator helps players determine the total FPs needed, how much can be covered by other players (often through "1.9 threads" or "swap groups"), the impact of their Arc Great Building's bonus on rewards, and ultimately, the net Forge Points the owner needs to contribute.

Who should use it?

• Great Building Owners: To plan their leveling projects, estimate costs, and understand how much they need to cover.
• Contributors: To find profitable spots on other players' GBs, especially when utilizing an Arc bonus.
• Guild Leaders: To manage guild GB leveling projects and ensure efficient FP distribution.

Common Misunderstandings: A frequent point of confusion is differentiating between the base FP cost of a level and the actual FPs needed from the owner after factoring in player contributions and Arc bonuses. Without a FoE Great Buildings Calculator, players might over-contribute, under-estimate costs, or miss out on optimal reward opportunities. The "1.9 thread" strategy, for example, relies heavily on precise calculations to ensure all spots are profitable for contributors with a high-level Arc.

B. FoE Great Buildings Formula and Explanation

The core idea behind the FoE Great Buildings Calculator is to balance the total Forge Points required for a GB level with the FPs contributed by other players (who receive rewards) and the owner's own investment. The Arc Great Building plays a crucial role by boosting these rewards.

The primary formula used is:
Owner's Net FPs to Cover = Total FPs Required - (Sum of Arc-Boosted Spot Rewards) - Owner's Contribution

Where:
Arc-Boosted Spot Reward = Base Spot Reward * (1 + (Arc Bonus Percentage / 100))

Let's break down the variables:

C. Practical Examples

Let's illustrate how the FoE Great Buildings Calculator works with a couple of scenarios.

Example 1: Leveling a Mid-Tier GB with a Basic Arc

A player wants to level their Lighthouse from Level 10 to Level 11. They know the total FPs required for this specific level are 1200 FPs. Their Arc is at Level 60, granting a 70% bonus. They plan to contribute 300 FPs themselves. The base rewards for this level are P1=150 FPs, P2=75 FPs, P3=30 FPs, P4=15 FPs, P5=10 FPs.

• Inputs:
  • Current GB Level: 10
  • Target GB Level: 11
  • Total FPs for Level Range: 1200 FPs
  • Arc Bonus Percentage: 70%
  • Owner's Contribution: 300 FPs
  • P1 Reward (Base FPs): 150 FPs
  • P2 Reward (Base FPs): 75 FPs
  • P3 Reward (Base FPs): 30 FPs
  • P4 Reward (Base FPs): 15 FPs
  • P5 Reward (Base FPs): 10 FPs
• Calculation:
  • Arc Multiplier = 1 + (70/100) = 1.7
  • P1 (with Arc) = 150 * 1.7 = 255 FPs
  • P2 (with Arc) = 75 * 1.7 = 127.5 FPs
  • P3 (with Arc) = 30 * 1.7 = 51 FPs
  • P4 (with Arc) = 15 * 1.7 = 25.5 FPs
  • P5 (with Arc) = 10 * 1.7 = 17 FPs
  • Total Spot Rewards (with Arc) = 255 + 127.5 + 51 + 25.5 + 17 = 476 FPs
  • Owner's Net FPs to Cover = 1200 (Total) - 476 (Spot Rewards) - 300 (Owner's Contribution) = 424 FPs
• Result: The owner needs to cover 424 FPs to complete the level.

Example 2: Utilizing the "1.9 Thread" Strategy for a High-Level GB

A player wants to level their Arc from Level 80 to Level 81. This requires 5000 FPs. Their Arc is already at Level 80, providing a 90% bonus (1.9 multiplier). They want to minimize their own contribution and rely on a "1.9 thread" where contributors secure spots for a guaranteed profit. The base rewards for this level are P1=1000 FPs, P2=500 FPs, P3=200 FPs, P4=100 FPs, P5=50 FPs.

• Inputs:
  • Current GB Level: 80
  • Target GB Level: 81
  • Total FPs for Level Range: 5000 FPs
  • Arc Bonus Percentage: 90%
  • Owner's Contribution: 0 FPs (initially, to see what's left)
  • P1 Reward (Base FPs): 1000 FPs
  • P2 Reward (Base FPs): 500 FPs
  • P3 Reward (Base FPs): 200 FPs
  • P4 Reward (Base FPs): 100 FPs
  • P5 Reward (Base FPs): 50 FPs
• Calculation:
  • Arc Multiplier = 1 + (90/100) = 1.9
  • P1 (with Arc) = 1000 * 1.9 = 1900 FPs
  • P2 (with Arc) = 500 * 1.9 = 950 FPs
  • P3 (with Arc) = 200 * 1.9 = 380 FPs
  • P4 (with Arc) = 100 * 1.9 = 190 FPs
  • P5 (with Arc) = 50 * 1.9 = 95 FPs
  • Total Spot Rewards (with Arc) = 1900 + 950 + 380 + 190 + 95 = 3515 FPs
  • Owner's Net FPs to Cover = 5000 (Total) - 3515 (Spot Rewards) - 0 (Owner's Contribution) = 1485 FPs
• Result: The owner needs to cover 1485 FPs after all spots are filled in a 1.9 thread. The FoE Great Buildings Calculator quickly shows this remaining cost, allowing the owner to plan their final FPs.

D. How to Use This FoE Great Buildings Calculator

Using the FoE Great Buildings Calculator is straightforward and designed for maximum efficiency:

1. Enter Current & Target GB Levels: Input the starting and desired levels for your Great Building.
2. Input Total FPs for Level Range: This is a crucial step. You will need to find the total Forge Points required to complete the specific level(s) you are targeting. This data is usually available on FoE wikis or fan sites for each GB and level.
3. Specify Your Arc Bonus Percentage: Enter the percentage bonus your Arc Great Building provides. For example, a Level 80 Arc gives a 90% bonus, so you would enter "90".
4. Add Owner's Contribution: Enter the amount of FPs you, as the GB owner, intend to contribute. Start with 0 if you want to see the maximum remaining FPs.
5. Input Base Spot Rewards: Enter the base Forge Point rewards for P1, P2, P3, P4, and P5 for the target level. Like the total FPs, these are specific to the GB and level and can be found on FoE wikis.
6. Click "Calculate FoE GB": The calculator will instantly process your inputs.
7. Interpret Results:
   • Owner's Net FPs to Cover: This is your primary result. A positive number means you still need to contribute that many FPs. A negative number means you will gain FPs (or have over-contributed for the current setup).
   • Intermediate Values: Review the Arc-boosted rewards for each spot and the total FPs from spots to understand how contributions are covering the cost.
8. Adjust and Re-calculate: Experiment with different owner contributions or Arc bonus levels to find your optimal strategy.
9. Copy Results: Use the "Copy Results" button to easily share your plan with guild members or save it for your records.

E. Key Factors That Affect FoE Great Buildings Leveling

Efficiently leveling Great Buildings in Forge of Empires involves understanding several interconnected factors. The FoE Great Buildings Calculator helps you quantify their impact.

1. Great Building Type: Each GB has unique FP costs per level and different base rewards for spots. High-level GBs like the Arc or Zeus will require significantly more FPs than lower-tier ones.
2. Current and Target Levels: The FP cost for a GB level generally increases exponentially as the GB levels up. Going from Level 10 to 11 is far cheaper than from Level 80 to 81.
3. Arc Great Building Level: Your Arc's level is paramount. A higher-level Arc provides a greater bonus percentage, making spot rewards more attractive to contributors and reducing the owner's net cost. An Arc at level 80 (90% bonus) is the cornerstone of the "1.9 thread" strategy.
4. Community & Guild Support: Active participation in guild "1.9 threads," swap groups, or donation chains significantly reduces the FPs an owner needs to contribute. Without external support, leveling GBs becomes much slower and more expensive.
5. Owner's FP Generation: Your daily Forge Point income (from city buildings, GBs, quests, etc.) directly impacts how quickly you can cover your remaining costs or contribute to other GBs.
6. Blueprint Availability: While not directly calculated by FPs, having enough blueprints for the target level is essential. Without them, you cannot level up, regardless of FPs.
7. Medal & Goods Costs: Some GBs require Medals or specific Goods for certain levels. These are additional costs to consider beyond FPs.
8. Event & Quest Rewards: FoE often provides FPs, blueprints, or goods as rewards for events and quests, which can supplement your GB leveling efforts.

F. Frequently Asked Questions about the FoE Great Buildings Calculator

G. Related Tools and Internal Resources

Explore other valuable resources to enhance your Forge of Empires gameplay:

• FoE Great Buildings Calculator: Our primary tool for GB leveling.
• Understanding Great Buildings in FoE: A deeper dive into how GBs work.
• Forge Point Mechanics Explained: Learn more about FP generation and usage.
• FoE Goods Calculator: Plan your goods production and trading.
• FoE Military Boost Calculator: Optimize your attack and defense bonuses.
• FoE Event Planner: Strategize for in-game events to maximize rewards.